1. Division of Neurology; Kaohsiung Veterans General Hospital; Taiwan R.O.C.
2. Faculty of Medicine; School of Medicine; National Yang-Ming University; Taiwan R.O.C.
3. Department of Nursing; Yuh-Ing Junior College of Health Care & Management; Taiwan R.O.C.
4. Division of Neurology, Department of Medicine and Toronto Western Research Institute; University of Toronto; Toronto Ontario Canada